28751261 has 8 divisors (see below), whose sum is σ = 35845824. Its totient is φ = 22403520.

The previous prime is 28751251. The next prime is 28751287. The reversal of 28751261 is 16215782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28751261 - 2⁶ = 28751197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28751201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186620 + ... + 186773.

It is an arithmetic number, because the mean of its divisors is an integer number (4480728).

Almost surely, 2^28751261 is an apocalyptic number.

It is an amenable number.

28751261 is a deficient number, since it is larger than the sum of its proper divisors (7094563).

28751261 is a wasteful number, since it uses less digits than its factorization.

28751261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373411.

The product of its digits is 6720, while the sum is 32.

The square root of 28751261 is about 5362.0202349488. The cubic root of 28751261 is about 306.3507625674.

The spelling of 28751261 in words is "twenty-eight million, seven hundred fifty-one thousand, two hundred sixty-one".